I don’t know where you have your prices from, but Desert Aerospace LLC seems to offer the TJ-100 for 44250€. Far from 100k$, and getting cheaper in $ because I’m sure Goldman Sachs will do anything they can to get the € far below dollar parity 8-)
tomjnx wrote:
I don’t know where you have your prices from
It was from Sonex. A long time ago though as a guesstimate (I guess 
) . 44250 € is also a lot of money, but no more than a standard 540. There is at least one RV-10 with a TP-100 flying a couple? of years ago, maybe several today. Ahh, I remember Kitplanes had a recent article about the Subsonex. Here is the utube version where they talk a lot about the engine also, they mention US$ 55k for the engine.
LeSving wrote:
Is there anything such as SEJ-rating?
Jet means type rating. But something like this is Annex II, I have no idea what you need (depends on national law).
Sure, it’s sfc is half that of the avgas burners (supposing we believe that we always operate them at the most efficient spot – which we obviously do…). However it weighs less than a third of a comparable piston engine so between that and higher JetA1 density the problem isnt unsolvable (added benefit – less weight on the nose, smaller arm required for the stab, less effort on the nose gear).
Add to that far smaller frontal area and no cooling drag and one might actually go a bit faster on less power.
Having said that Gnome rotary engines work perfectly, no reason to change.
